.boton {
    background: none;
    border-radius: 20px;
    border: solid 2px none;
    padding: 4px;
    margin: 0px !important;
}

.boton_credito {
    border-radius: 20px;
    border: solid 2px #fff;
    padding: 4px;
}
.boton_credito_activacion {
    border-radius: 20px;
    border: solid 2px #fff;
    padding: 4px;
    color:white;
    text-decoration:none;
}

@media (max-width: 640px) {
    .boton {
        background: black;
        border-radius: 20px;
        border: solid 2px #000;
        padding: 4px;
        margin: 0px !important;
    }
    .boton_credito {
        background: black;
        border-radius: 20px;
        border: solid 2px #fff;
        padding: 4px;
    }
}

@media (min-width: 800px) {
    #contactos br {
        display: none;
    }
}